Electro-magnet for signals



m0 Model.) W E DAVIS 2 Smets-sheet 1.

ELECTRO MAGNET POR SIGNALS.

No. 327,536A Patented Oct. 6, 1885.

1E@ Moda.) 2 sheetssheen 2. W. E. DAVIS. ELECTRO MAGNET EOE SIGNAES.

No. 327,536. Patented Oct. 6, 1885.

muli ATTHNEYJ VILLIAM E. DAVIS, OF JERSEY CITY, NEW JERSEY.

ELECTRO-MAGNET FOR SIGNALS.

SPECIFICATION forming part of Letters Patent No. 327,536, dated October 6, 1885. Application filed April 24, 1855. Serial No. 163,264. (No model.)

projecting bars F F which are farthest away from their respective spools.

Then a current is passed through the electro-magnet A, the arms F F will both be magnetized, and will draw the armature E toward the spools. The inclined upper faces of the bars F F, cooperating with the convex lower To all whom, it may concern.:

Be it known that I, WILLIAM E. DAvis, a resident of Jersey City, in the county ot' Hudson and State of New Jersey, have invented an Electro-llIagnet for Electric Signals, of which the following is a full, clear. and exact description, reference being made to the accompanying drawings, in whichside of the armature E, serve to draw the Figure l is a side elevation of my improved armature gradually into alignment with the electro-magnet. Fig. 2 is a front View ofthe same. Fig. 3 is a top view of the same. Fig. 4 is a side view of a modification ofthe same, and Fig. 5 is a top view of the modification. This invention relates to a new electro-magn l spools-that is, into the position shown by dotted lines in Fig. 3. As long as the current lasts the armature will remain in this position-'that is, above the spools. The moment the current is interrupted the spring c will exert its influence, and will draw the armature E back into the fullline position which is shown in Fig. 3.

The shaft O may carry a signal, D, which, when the current is established, will indicate danger and when it is interrupted it will indicate safety.7

net'for use in operating a signal or the like.

The invention consists in combining an elec trovmagnet with projecting pole-pieces of peculiar form, above which the armature, having convex lower surface, is adapted to rotate or oseillate, as hereinafter described.

By means of my improved instrument the armature which carries the signal will be When the part-s are in the position shown turned into one position whenever the circuit by full lines in Fig. 8, the distance vertically is closed, and automatically turned back by a i between the armature and the arms F will be suitable spring into another position whengreater than when in the position shown by ever the circuit is open, provided one single i dotted lines in that figure. electro-magnet is used, while if two magnets magnet upon the armature is increased as the are used the position of the signal will dearmature approaches the cores of the electropend entirely upon the current that passes magnets. through either one of said electro-magnets. In Figs. 4 and 5 I have represented the in- AvVith more particular reference to Figs. l, l vention duplicatedthat is to say, I have 2, and 3, the letter A therein represents an shown two electro magnets, A and G, of the electromaguet fixed upon a suitable stand, B. same kind as the electro-magnet A, which is in which stand an upright shaft, C, carrying shown in Fig. 8. The electro -magnet A ot' a signal, D, is swiveled. This upright shaft the niodiiication has the projecting arms F F, carries the armature E, which is a bar having that extend toward the electro-magnet G, and convex lower l'ace, and adapted to extend over the electro-magnet G has similar arms, H H, the centers of the two spools of the electrothat extend to the electro-magnet A.

magnet A, as shown by dotted lines in Fig. 3. What I claim is- To each of the spools of said electromagnet, The electro-magnet A, having projecting arms F F, inclined on their upper sides, in combination with the armature E, which is above said arms, and which has a convex lower l face, substantially as described.

WILLIAM E. DAVIS.

at the pole ends thereof, is secured a projecting bar, F, of iron or analogous material, which bar has an inclined upper face, so that it is highest near the spool and lowest where farthest away from its spool. AV little spring. a, draws the shaft C so as to normally hold the armature E in the position in which it is represented by full lines in Fig. 3-that is to say, with its ends above those parts of the Vi tnesses:

The power of the 

